660 Triple Engine - Technical Presentation

Discussion in 'Technical Help' started by chassis, Oct 15, 2025 at 9:18 PM.

  1. chassis

    chassis Member

    Aug 6, 2025
    68
    18
    USA
    Looking for a technical presentation for the 660 triple engine. Searching Google, this site and others has not produced what I am looking for.

    I am coming from the Porsche and Mercedes world where such documents are common. I am looking for descriptions of systems (cooling, ignition, induction, exhaust, lubrication, electrical, etc etc) and cutaway illustrations.

    I have found videos of breathless Triumph enthusiasts (I am one) but nothing that compares with what I see from German car companies. Thanks in advance for any suggestions.
     
  2. chassis

    chassis Member

    Aug 6, 2025
    68
    18
    USA
    #2 chassis, Oct 15, 2025 at 10:27 PM
    Last edited: Oct 15, 2025 at 10:36 PM
    Many questions answered in this video:

    One main question was whether the cylinders are steel or plasma coated or alusil or nikasil. Answer: steel. Thanks be to God.

    Coated and etched cylinders are the curse of modern engines.

    Not a fan of a girdled block vs a deep-skirted design but it has been used successfully for quite some time.

    Cam bearing cap bracket (1-piece) is interesting.

    Cylinder head seems straightforward.

    Need to dig into the cooling system more deeply.
     
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